Clock.



A. L. HAHL.

CLOCK. APPLICATION FILED SEPT. 26, 1903.

Patented Dec. 1, 1908.

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GLOGK.

APPLICATION FILED SEPT. 2 ,1903.

905,81 6. Paten'fed Dec, 1, 1908.

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A. HAHL.

GLOGK. APPLICATION FILED SEPT.26,1903.

Patented Dec. 1, 1908.

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UNITED STATES PATENT OFF? AUGUSTUS L. HAHL, OF CHICAGO, ILLINOIS,ASSIGNOR TO HAHL AUTOMATIC CLOCK COM- PANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

CLOCK.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed September 26, 1903. Serial No. 17 5773.

To all whom it may concern:

Be it known that I, rinensrus L. Henri, a citizen of the United States,residing at Chicago, county of Cook, State of Illinois, have invented acertain new and useful Improvement in Clocks, and declare the followingto be a full, clear, and exact description of the same, such as willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings, which form apart of this specification.

My invention relates in general to clocks, and more particularly tolever clocks.

The primary object of my invention is to pr vide a clock havingabsolutely uniform motive power and which while comparatively simple inconstruction will be of permanently high time keeping etliciency underall conditions.

A further object of my invention is to provide a clock the motor springsof which will be automatically electrically wound at frequent intervalsso that the springs will uncoil only a fraction of a revolution andtheir adjacent convolutions consequently need never touch therebyavoiding all friction in the springs and permitting lighter springs tobe used.

A still further object of my invention is to provide an electricself-winding clock in which the work of closing the contacts will bedone mainly by the armature of the winding magnets, thereby relievingthe movement of all work except that of tripping one of the contactswhich is done by such an extended leverage as to exert practically noresistance upon the clock movement.

My invention will be more fully described hereinafter with reference tothe accompanying drawings in which the same is illustrated as embodiedin a convenient and practical form, and in which Figure l is a centralelevation view; Fig. 2 a plan view; Fig. 3 a detail elevational view;Fig. 4 a detail plan view of the winding mechanism, the parts beingshown in the positions they assume when the magnets are energized; Fig.5 a view similar to Fig. 4 showing the parts in the positions theyoccupy when the magnet is deenergized; Figs. 6, 7, and 8 detail views ofthe circuitmaking and breaking mechanism; Fig. 9 a plan view of thecircuit-controlling disk; Fig. 10 a sectional view on line 10l0, Fig. 9;Fig. 11 a detail view of the mechanism for alternately winding the motorsprings; Fig. 12 a fragmentary elevational view of the upper end of themagnet and the circuitcontrolling contacts; Fig. 13 an enlarged detailview of the circuit-controlling contacts; Fig. 1a a detail elevationalview of that part of the clock movement which controls the contacts; andFig. 15 an enlarged sectional view through one of the motor springs andthe adjacent parts.

Similar reference characters are used to designate similar parts in theseveral figures of the drawings.

A indicates a vertical supporting plate to which is secured the face Bof the clock.

6 designates the dial upon the face of the clock, while Z) indicates anoutwardly flaring flange which supports within its periphery the glass13.

A designates a laterally projecting bracket upon which is supported thewinding mag net.

A designates a horizontal laterally projecting plate supported upon theupper end of the vertical plate A.

A designates a second horizontal plate located above the plate A andsupported by means of posts a and a interposed between and suitablysecured to the plates A and A C designates the minute hand shaft whichis journaled in brackets a and a supported by and depending below theplate A The minute hand shaft extends through a bearing in the upper endof the vertical plate A and projects through the face 13 and dial 6.

c designates the minute hand secured to the outer end of the minute handshaft.

0 designates the hour hand which is suitably secured to a sleeve Csurrounding the minute hand shaft and connected thereto with the usual12 to 1 speed reducing gearing C.

D and D indicate twin main wheel staves which are located vertically andhave reduced lower ends extending through bearings in the plate A andsupported at their lower points upon plates secured to and locatedbeneath the plate A, as clearly shown in Fig. l.

6 and c designate the main Wheels which are rigidly secured near theupper ends of the staves D and D E and E designate twin main springsmounted above the main wheels (2 and c and rigidly secured thereto attheir outer ends by any suitable means, such for instance as a hook (ias shown in Fig. 15. The inner ends of the main springs are rigidlysecured to a drum F mounted axially above the corresponding main wheelstaff D or D see Fig. 15, and surrounding a pin f which extends throughand is rigidly secured to the top supporting plate A The lower end ofeach pin f is enlarged and provided with a recess into which extends thereduced upper end of the corresponding main wheel staff D or Dconcentrically surrounding and rigidly secured to the sleeve F locatedabove the staff D, is a disk G having two lugs g projecting radiallyfrom the periphery thereof and located at diametrical points. Locatedabove the disk G is a ratchet wheel or pinion H also rigidly fixed tothe sleeve F. The teeth It located around the periphery of the ratchetwheel H are divided into two series, such series being separated byradially shorter inclined teeth /L located at diametrically oppositepoints on the periphery of the ratchet wheel. Located above the ratchetwheel H is a disk K also surrounding and fixed to the sleeve F. The diskK is provided with two radial teeth 7a, is, located at diametricalpoints on its periphery as clearly shown in Fig. 5. The sleeve Fsuperimposed above the staff D is provided with similar disks and gearwheels G H and 1 the disk G being provided with diametrically arrangedlugs 9 while the gear wheel H is provided with two series of teeth 72,separated by diametrically short inclined teeth h, h. The disk K is alsosimilar to the disk K in that it is provided with diametrically locatedinclined teeth L 6 The main wheel staff D is provided with a bevel gear(l which meshes with a large bevel gear 0 rigidly secured to the minutewheel shafts C. Interposed between the main wheel staves D and D is avertical stafl D having reduced upper and lower ends extending throughhearings in the plates A and A respectively, the lower reduced end beingsupported upon a plate located beneath the plate A as clearly shownin 1. Fixed to the staff D is a pinion c in mesh with the main wheels 6and c and lo cated in alinement with their centers. The staff D connectsthe main spring with the escaping mechanism by means of a wheel f whichmeshes with a pinion n on the escape ment shaft wheel a.

N designates the escape wheel which 00- operates with an anchor M fixedto the anchor stafi m.

Z designates the balance staff which is operatively connected to theanchor staff by any usual means.

L designates the hair spring which is located in a horizontal plane andis as usual secured at its inner end to the balance staff and at itsouter end to a fixed point Z.

P designates a shaft journaled above the plate A and projecting at itsouter end through the face of the clock where it is squared to receive akey.

p is a worm upon the shaft P which meshes with a segment P which isprovided with the usual means 9 for engaging the hair spring to regulatethe clock.

Mounted upon the bracket A is the magnet comprising spools R and R Rdesignates the armature which is rigidly secured to the upper end of thevertical shaft R the latter being rotatably mounted by means of itslower end being reduced and extending through the yoke of the magnet andresting on the upper surface of the bracket A. The upper end of theshaft R is journaled in a bracket 1 which projects upwardly from theyoke and is bent laterally at its upper end where it supports the shaftR Rigidly carried by the armature is an angular bracket V the oppositeend I) of which is rigidly secured to the armature. Upon the bracket Vis j ournaled a rod V in suitable ears 4/ and a respectively. Rigidlysecured to the outer end of the rod V is a curved bar 1V carryingsegmental rack bars TV and These rack bars are pivoted upon horizontallyprojecting pins 10 and w respectively, rigidly fixed to the bar W. Alinger w projects from one end of the bar V and extends beneath thesegmental rack TV, while a pin w projects from the bar TV beneath thesegmental rack as clearly shown in Figs. l and 5. Each of the segmentalracks WV and l 72 is provided with a series of short teeth w and wrespectively equal in number to each series of teeth 72, and 72 on theratchet wheels I and H Each of the segmental racks is provided at itsfree end with a long tooth w and 108 adapted to engage the shortinclined teeth It on the respective ratchet wheels H and H Eachsegmental rack is provided with a shoulder to and 10 adjacent to itspivotal point of connection with the bar 1V and located in a higherplane than the teeth on such rack bar and thereby adapted to cooperatewith the lugs and k located at diametrical points on the peripheries ofthe disks K and K In order that the twin main springs maybe woundalternately one at each energization of the magnet, the rack bar V isadapted to be tilted so as to elevate one of the segmental rack barsabove the plane of the cooperating ratchet wheel and disks, while theother segmental rack is in position to engage the teeth on thecotiperating ratchet wheel and disks. The means for oscillating the barN consist in a transverse pin (Z extending through and projecting at theopposite sides of the main wheel staff D which engages e inclinedsurface 00 see Fig. 11, on the under side of a lever X, the latter beingpivotally supported at one enc, ac, upon a post X, while its other endis provided with an upwardly projecting pin a: which engages the undersurface of the tail piece to pro jecting from the bar W.

I provide the following mechanism for intermittently closing the circuitthrough the nagnet to energize the same and thereby rock the armatureand through the segmental rack bars carried thereby alternately wind themain springs. An angular bracket S is rigidly supported above thearmature y any suitable means, such for instance as a stud s secured tothe upper surface of the inturned end of the bracket 1. One arm of theangular bracket S serves as a bearing for the upper end of the staff S,the lower end of which is journaled upon the bracket a rigidly securedto the bracket r, as clearly shown in Fig. 1. Fixed upon the staff S isa disk S see Figs. 12 and 14:, provided with four radially projectingfingers 8 located 90- apart, those 180 apart being in the samehorizontal plane and in a different horizontal plane from the otherdiametrical pair. Fixed upon the staff S immediately below the disk S isa raachet wheel S provided with four teeth .9 such teeth being 90 andprojecting radially at points intermediate of the adjacent fingers 8 asclearly shown in Figs. 6 to 8.

Rigidly secured to the inner edge of the armature is a horizontallyprojecting finger R carrying in its outer end a curved flange located inthe same horizontal plane as are the teeth 8 on the ratchet wheelExtending through the main wheel stafi :the upper end thereof is a camdisk T comprising four inclined sectors T, T T and T", as clearlyindicated in Figs. 9 and 10. lnterposed between the adjacent edges ofthe several sectors are raised portions t, F, t and 5 terminating adistance radially within the periphery of the cam disk T. Carried by theouter arm of the angular bracket at the end thereof are two springfingers U and U which extend into contact with the upper surface of thecam disk T, as clearly shown in Figs. 6 to The finger U occupies aposition above the cam disk sulficiently near the center thereof to beengaged by the raised portions 25, 25 t and i as the cam disk revolves,while the spring finger U occupies a position above the cam diskradially beyond said raised portions. The finger U has rigidly securedto the upper surface thereof a contact a, preferably formed of platinumand provided with a vertical groove, as clearly shown in Fig. 13. Thespring finger U has fixed to its upper surface and insulated therefrom asecond contact if provided with a horizontally V- shaped groove at thebottom of which an opening is provided. The contact a engages within the.i-shaped groove in the contact a with its vertical rib projecting atits lower end into the opening at the bottom of the "v -shaped groove.One of the conductors extending to a battery or other source ofelectricity and connecting with the coils of the magnet spools isconnected to the spring finger 1), while the lead extending from theopposite pole of the battery is connected to the contact if, so that asthe contacts a and a are engaged or disengaged, the circuit through themagnet is made or broken.

The operation of my invention is as follows: The tension of the twinmotor springs E and E is applied through the gear wheels 0 and c and themeshed pinion e to the main wheel staves D and D and thence through thebeveled gear wheels d and c to the minute hand shaft C and from suchshaft to the hour hand 0 through the interposed speed reducing mechanismC and sleeve C The tension of the twin motor springs is also exertedthrough the wheel f fixed upon the staff 1) and the pinion it upon theescapement shaft 11 to the escape wheel N, the movement of which iscontrolled by the anchor M, the oscillation of which in turn is governedby the hair spring L and the balance 0 which are connected to the anchorthrough the ordinary connecting means between the balance shaft Z andthe anchor, as clearly shown in Fig.

The main springs are normally only under such tension that theiradjacent convo lutions do not touch and are kept under such tension bythe frequent winding thereof due to the energization of the windingmagnet which is effected at predetermined intervals by means of thecircuit therethrough being closed by the movement. By referring to Fig.6 it will be seen that the pin (Z upon the main wheel staff D is inengagement with one of the radial fingers s of the disk S which in turnis fixed upon the staff S upon which is also fixed the cam disk T. Itwill be seen that in Fig. 6 the spring finger U has fallen from the edgeof the inl 1 wheel and disk fixed upon such sleeve. The

clined cam surface T while the spring finger U is held upwardly at itslower end by means of the raised portion 2?, consequently the circuit isbroken as the contact a carried by the spring finger U is held above theV-shaped contact a mounted upon the spring finger U The rotation of themain wheel staff D rotates the staff S and with it the cam disk T to theposition shown in Fig. 7, through the engagement between the pin (Z andthe finger 8 The movement of the cam disk T to the position shown inFig. 7 permits the spring finger U to fall from the raised portion t sothat the contact u engages the contact 10 thereby closing the circuitthrough the magnet and causing the same to oscillate the armature R tothe position shown in Fig. 8. The movement of the armature from theposition shown in Fig. 7 to that shown in Fig. 8 rotates the staff Sthrough the engagement of the flange carried by the armature with theadjacent tooth s on the disk S rigidly fixed upon the staff S, therebypartially rotating the cam disk T. During such movement of the cam diskT by the armature the contacts u and a are kept tightly pressed togetherby reason of the engagement of the lower ends of the spring fingers Uand U with the cam surface T the inclination of the cam surface beingsuch that the spring finger U is lifted upwardly more than the springfinger U, thereby causing the V-shaped contact a to slightly liftupwardly the contact a. Upon the completion of the rotation of the staffS by the armature, the spring finger U falls from the edge of the camsurface T thereby breaking the circuit by permitting the contact 14 todrop out of engagement with the contact a, the latter being retained inan elevated position by reason of the spring finger U being supported bythe raised portion 6" of the cam disk T. Upon the breaking of thecircuit through the magnet, the spring r instantly swings the armature Rto the position shown in Fig. 6, through the medium of the shaft R tothe upper end of which the armature is secured. continues broken untilthe staff D is rotated 90, whereupon the next pin (Z* engages thecorresponding finger s and rotates the cam disk the slight distancenecessary to permit the spring finger U to fall from the raised portionT thereupon again closing the circuit through the magnet.

When the magnet is energized and the armature oscillated the curved barW carried by the armature through the interposed rod V journaled uponthe bracket V which is connected at o to the armature, causes one of thesegmental rack bars TV or to rotate the corresponding sleeve above themain wheel staff D or I) through engagement The circuit through themagnet with the teeth and projections on the ratchet ratchet segmentwhich is efiective at each energization of the magnet, is determined bythe position of the pin (Z on the main wheel stafi D with respect to theoscillating lever K, see in particular Figs. 1 and 11. VV hen the pin (Zoccupies the position shown in Fig. 11, the lever X occupies its lowerposition as does also the bar which is swung downwardly by gravity intocontact with the reduced upwardly extending end 00 of the lever X. Thesegmental rack W is then in the position shown in Fig. 5 and in the samehorizontal plane as the ratchet wheel H while the segmental rack WVoccupies an elevated position above the plane of the ratchet wheel H anddisk K. lVith the parts in the position shown in Fig. 5 an energizationof the magnet moves the parts to the position shown in Fig. 4. Duringsuch movement the front long tooth 'w on the segmental rack \V engagesthe short inclined tooth it on the ratchet wheel H and partially rotatessuch ratchet wheel, bringing the adjacent ratchet tooth 7L into positionto be engaged by the first one of the short teeth to on the segmentalrack The teeth to engage in succession the teeth 7L and rotate theratchet wheel H until the projection L on the disk K which is fixed uponthe sleeve F, is brought into position to be engaged by the shoulder 10which coinpletes the rotation of the sleeve F through 180, and bringsone of the lugs g on the disk G into position to be engaged by the pawl9 see Fig. 2, which retains the sleeve F in the position to which it hasbeen ro tated and maintains the main spring E under the tension whichhas been imparted to it. hen the circuit through the magnet is brokenand the armature is swung by the spring r from the position shown inFig. 4 to that shown in Fig. 5, the short teeth to on the segmental rackdo not engage the teeth on the ratchet wheel H as the short tooth'h thenoccupies a position opposite to the segmental bar. YVhen the long tooth10 reaches the inclined tooth 7L it is elevated thereby and falls behindthe same to the position shown in Fig. 5, such elevation of the tooth wbeing permitted by the pivotal connection between the segmental rack Vand the rack bar V. It will be therefore noticed that upon the returnmovement of the segmental rack no frictional engagement occurs betweenthe same and the ratchet wheel H except that due to the engagementbetween the long tooth 'w and short tooth 71 After the operation abovedescribed the rotation of the main wheel staff '1) elevates the lever Xthrough the engagement of the pin (F with the cam m see Fig. 11, therebyswinging upwardly the bar W about its point of pivotal connection uponthe bracket V and elevates the segmental rack above the horizontal planeof the ratchet wheel H and disk Y and permits the segmental rack W to belowered into the same horizontal plane as the cooperating ratchet wheelH and disk K. The next energize.- tion of the magnet consequentlyrotates the sleeve F above the main wheel stall D and thereby winds themain spring E through the engagement of the teeth on the rack bar lVwith the teeth on the ratchet wheel H and through the engagement of theshoulder to with one of the lugs on the disk K.

The operation of the segmental rack W in rotating the sleeve above thestaff D is in all respects similar to the operation above described inconnection with the segmental rack and its cooperation with the ratchetwheel and disk in rotating the sleeve F above the wheel staff D Thetension imparted to the main spring E is retained and the parts held inthe positions to which they are rotated by means of the pawl g see Fig.2, engaging one of the lugs g on the disk G.

The continued rotation of the staff D through 180 disengages the pin dfrom the lever X, permitting the latter to fall and the bar W to beoscillated in position to lower the segmental rack VP in position toagain wind the spring E It is thus evident that the twin main springsare alternately wound and maintained under uniform tension which permitsbatteries of less voltage to be employed than would be necessary if bothof the springs were wound simultaneously. I, however, contemplatewinding both springs simultaneously at each energization of the magnetwhere the size of the battery employed is not of importance.

By means of the improved contacts 2/. and 71 shown in detail in Fig. 13,the engaged surfaces are always kept free from dustand in a condition toefiect a good electrical connection, the particles of foreign matterbeing scraped by the contact u from. the en gaged surfaces and permittedto fall through the opening at the bottom of the Vshaped contact 20Three points of contact exist between the contact a and a namely between the edges of the contact a, at either side of the rib and thebottom of the V- shaped contact a and between the rib and the adjacentwall of the contact if, as clearly shown in Fig. 13.

By the means which I employ for controlling the circuit through themagnet a minimum amount of work is imposed upon the clock movement owingto the movement of the armature maintaining the contacts in engagementthrough the cam disk T and spring fingers U and U it only beingnecessary for the movement to rotate the staff S, and with it the camdisk T, the distance indicated by Figs. 6 and '7, and such rotation ofthe stall S is effected by a multiplied leverage due to the fingers sprojecting radially upon the stall S a much greater distance than do thepins d and (Z project radially from the main wheel staff D.

From the foregoing description it will be observed that I have inventedan improved mechanism for electrically winding a clock in which the workof controlling the circuit through the motor magnet is mainly performedby the magnet itself and only a minimum of resistance imposed upon theclock movement.

While I have described more or less precisely the details ofconstruction, I do not wish to be understood as limiting myself thereto,as I contemplate changes in form, the proportion of parts, and thesubstitution of equivalents, as circumstances may suggest or renderexpedient, without departing from the spirit of my invention.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. In a self-winding clock, the combination with a main wheel staff, ofa main spring operatively connected at one end to the main wheel, aratchet wheel to which the opposite end of the main spring is secured, arack bar cooperating with said ratchet wheel, and means forautomatically actuating said rack bar at predetermined intervals, andmeans for disengaging the rack bar from the ratchet wheel at the end ofthe stroke of the rack bar.

2. In a self-winding clock, the combination with a main wheel staff, ofa main spring operatively connected at one end to the main wheel, aratchet wheel to which the opposite end of the main spring is secured, arack bar cooperating with said ratchet wheel, an electro-magnet thearmature of which is connected to said rack bar, and means forenergizing said magnet at predetermined intervals thereby actuating saidrack bar and winding said spring, and means for disengaging the rack barfrom the ratchet wheel at the end of the stroke of the rack bar.

3. In a self-winding clock, the combination with a plurality of mainwheel staves, a main spring operatively connected at one end to eachmain wheel, a ratchet wheel located in axial alinement with each mainwheel staff to which the opposite end of the corresponding main springis secured, a rack bar cooperating with each ratchet wheel, and meansfor automatically actuating said rack bars at predetermined intervals.

In a self-winding clock, the combination with a plurality of main wheelstaves, of a main spring operatively connected at one end to each mainwheel, a hand staff interposed between and operatively connected to saidmain wheel staves, a ratchet wheel located axially above each main wheelstaff to which the corresponding main springs are secured, rack barscooperating with said ratchet wheels, an electro-magnet the armature ofwhich is operatively connected to said rack bars, and means forenergizing said magnet at predetermined intervals and thereby actuatingsaid rack bars to wind said springs.

5. In a self-winding clock, the combina' tion with a plurality of mainwheel staves, amain spring operatively connected at one end to each mainwheel, a ratchet wheel located in axial alinement with each main wheelstaff to which the opposite end of the corresponding main spring issecured, a rack bar cooperating with each ratchet wheel, and means foralternately and automatically actuating said rack bars at predeterminedintervals of time.

6. In a self-winding clock, the combination with a plurality of mainwheel staves, a main spring operatively connected at one end to eachmain wheel, a ratchet wheel located in axial alinement with each mainwheel staff to which the opposite end of the corresponding main springis secured, a rack bar cooperating with each ratchet wheel, anelectro-magnet the armature of which is connected to said rack bars,means for energizing said magnet at predetermined intervals, and meansfor engaging each rack bar with its cooperating ratchet wheel duringalternate energizations of the magnet.

7 In a self-winding clock, the combination with a plurality of mainwheel staves, of a seconds hand staff interposed between and operativelyconnected to said main wheel staves, main springs operatively connectedto said main wheel staves, ratchet wheels located axially above saidmain wheel staves to which the respective main springs are secured, rackbars cooperating with said ratchet wheels, an electro-magnet for windingsaid main springs, a bar pivotally carried by the armature of saidmagnet to which said rack bars are pivotally connected, means foroscillating said bar and thereby alternately lifting one of said rackbars out of the plane of its cooperating ratchet wheel.

8. In a self-winding clock, the combination with a plurality of mainwheel staves, of a seconds hand staff interposed between and operativelyconnected to said main wheel staffs, main springs operatively connectedto said main wheel staves, ratchet wheels located axially above saidmain wheel staves to which the respective main springs are S3, cured,rack bars cooperating with said ratchet wheels, an electro-magnet forwinding said main springs, a bar pivotally carried by the armature ofsaid magnet to which said rack bars are pivotally connected, a leverengaging said bar to oscillate the same and pivotally mounted adjacentto one of said main wheel staves, a pin projecting from said adjacentmain Wheel stafi and adapted to periodically engage a cam on said leverto lift the same and thereby oscillate said bar and lift one of saidrack bars out of the plane of its cooperating ratchet wheel, the otherrack bar being lowered by gravity into the plane of its cooperatingratchet wheel when said pin is disengaged from said cam.

9. In a self-winding clock, the combination with a main wheel staff, ofa main spring operatively connected at one end to the main wheel, asleeve mounted above said staff to which the opposite end of the mainspring is secured, a ratchet wheel fixed to said sleeve having a seriesof peripheral teeth and a single inclined short tooth in advance of saidseries of teeth, a ratchet bar having a long tooth adapted to engagesaid short tooth on the ratchet wheel and a series of teeth adapted tocooperate with the series of teeth on the ratchet wheel, and means forautomatically actuating said ratchet bar.

10. In a self-winding clock, the combination with a main wheel staff, ofa main spring operatively connected at one end to the main wheel, asleeve mounted above said staff to which the opposite end of the mainspring is secured, a ratchet wheel fixed to said sleeve having a seriesof peripheral teeth and a single inclined short tooth in advance of saidseries, a disk located above said ratchet wheel and also fixed to saidsleeve and having a tooth projecting radially between the last tooth ofsaid series and the succeeding short tooth, a ratchet bar having a longtooth adapted to engage the short tooth on said ratchet wheel and aseries of teeth adapted to cooperate with the series of teeth on theratchet wheel, a shoulder on said ratchet bar located in a plane abovethe teeth thereon and adapted to engage the tooth on said disk, andmeans for automatically actuating said ratchet bar.

11. In a self-winding clock, the combination with a main wheel staff, ofa main spring operatively connected at one end to the main wheel, asleeve mounted above said staff to which the opposite end of the mainspring is secured, a ratchet wheel fixed to said sleeve having a seriesof peripheral teeth and a single inclined short toothin advance of saidseries, a disk located above said ratchet wheel and also fixed to saidsleeve and having a tooth projecting radially between the last tooth ofsaid series and the succeeding short tooth, a ratchet bar having a longtooth adapted to engage the shorttooth on said ratchet wheel and aseries of teeth adapted to cooperate with the series of teeth on theratchet wheel, a shoulder on said ratchet bar located in a plane abovethe teeth thereon and adapted to engage the tooth on said disk, a seconddisk also fixed upon said sleeve and having radial lugs, a pawl adaptedto engage the lugs on said second disk to retain the spring undertension, and means for automatically actuating said ratchet bar.

12. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby upon the energization of the magnetthe main spring is wound, cooperating contacts for closing the circuitthrough said magnet, means actuated by the clock movement for closingsaid contacts, and means actuated by the armature of the magnet formaintaining the contacts closed, opening the contacts, and setting themin position to be closed by the clock movement.

13. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby upon the energization of the magnetthe main spring is wound, cooperating contacts for closing the circuitthrough said magnet, spring fingers upon which said contacts aremounted, means for relatively moving said fingers to close and open thecontacts carried thereby, such means being actuated by the clockmovement to close the contacts and by the armature of the magnet tomaintain the contacts closed, to open the contacts and to set thecontacts in position to be closed by the clock movement.

let. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby upon the energization of the magnetthe main spring is wound, cooperating contacts for closing the circuitthrough said magnet, spring fingers upon which said contacts aremounted, means for relatively moving said fingers to close and open thecontacts carried thereby, a pin carried by the main wheel staff foractuating said means to close the contacts and connecting mechanisminterposed between the armature of the magnet and said means formaintaining the contacts closed, opening the contacts and setting themin position to be closed by the clock movement.

15. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby the energization of the magnetwinds the main spring, contacts for making and breaking the circuitthrough said magnet, a rotary stafi, means carried by said staff forclosing and opening said contacts, operative connections between theclock movement and said stafi for rotating the latter and therebyclosing the circuit through the magnet, and independent operativeconnections between the armature of the magnet and said staff forrotating the latter to open said contacts.

16. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby the energization of the magnetwinds the main spring, contacts for making and breaking the circuitthrough said magnet, a rotary stafi', means carried by said staff forclosing and opening said contacts, a finger projecting from said staff,a pin carried by the clock movement adapted to engage said finger torotate said staff and thereby close the contacts, a tooth projectingfrom said staff, a projection carried by the armature of the magnetadapted to engage said tooth to rotate said staff and thereby open thecontacts.

17. The combination with a self-winding clock, of an electro-magnet,operative connections interposed between the armature of said magnet andthe main spring of the clock whereby upon the energization of the magnetthe main spring is wound, cooperating contacts for closing the circuitthrough said magnet, spring fingers upon which said contacts aremounted, a rotary stafi, a cam disk carried by said staff with which thelower ends of said spring fingers engage, operative connections betweensaid staff and the clock movement for rotating said cam to such aposition that the contacts are closed, and operative connections betweenthe armature of said magnet and said staff for rotating said cam diskinto position to open said contacts.

18. In an electric self-winding clock, the combination with anelectro-magnet, of contacts controlling the circuit through said magnet,spring fingers carrying said con tacts, a rotary cam disk upon thesurface of which the ends of said spring fingers engage, said surfacecomprising upwardly inclined sectors adapted upon rotation of the diskto elevate the ends of the fingers and retain the contacts engaged, andraised portions on said cam disk adapted to retain one of said springfingers elevated while the other falls thereby separating said contactsand breaking the circuit through the magnet, and means actuated by theclock movement and by said armature for rotating said cam disk andthereby controlling the circuit.

19. In an electric self-winding clock, the combination with anelectro-magnet, of operative connections between the armature of saidmagnet and the main spring of the clock whereby upon an energization ofthe magnet the main spring is wound, contacts controlling the circuitthrough said magnet, one of said contacts having a V-shaped groove toreceive the other contact, and means for relatively moving said contactsto control the circuit.

20. In an electric self-Winding clock, the combination with anelectro-magnet, of operative connections'between the armature of saidmagnet and the main spring of the clock whereby upon an energization ofthe magnet the main spring is Wound, contacts controlling the circuitthrough said magnet, one of said contacts having a V-shaped groove Withan opening at the bottom thereof, and the other contact adapted to bereceived in said V-shaped groove and having a rib adapted to projectthrough said opening when the 15 contacts are closed.

In testimony whereof, I sign this specification in the presence of twoWitnesses.

AUGUSTUS L. 'HAHL. "itnesses GEO. L. \VILKENSON, C. C. CUNNINGHAM.

